Microsoft has released cumulative update KB5095056 (build 28020.2308) for Windows 11 version 26H1, available to Windows Insider program participants on the Beta channel. This patch belongs to the active development branch and is aimed at testing future operating system capabilities. In this update, the main focus is on improving the audio subsystem.
- Improved reliability of the HD Audio driver. The build has increased the stability of the built-in driver for High Definition Audio devices. This fix is intended to eliminate potential crashes and errors that could occur during audio playback or when using recording devices, ensuring smoother operation of the audio system.
No known issues for this build are listed at the time of release. Microsoft emphasizes that the features and capabilities included in this preview build may never reach the final release. The company uses these builds to experiment with various concepts and gather feedback from insiders. The contents of builds may change, be removed, or be replaced during development, and some features may appear in future versions of Windows only when they are fully ready.
To install the update, go to Settings > Windows Update and click Check for updates. After downloading and starting the installation, a system restart will be required to complete the process. This build is distributed exclusively among participants of the Beta channel of the Windows Insider program.
| Feature / Change | Performance Gain/Loss | Optimization | PC Speed Impact | Gaming Optimization |
|---|---|---|---|---|
| Improved reliability of the HD Audio driver | 🟢 Minor Gain (reduced audio-related crashes) | 🟢 Driver Stability Optimization (eliminates potential crashes/errors during playback/recording) | 🟢 Minor Improvement (smoother audio system operation, less system interruptions) | 🟢 Low Impact (more stable audio in games, fewer dropouts/crashes) |
Find and Change Settings
| Setting | Where to find | How to change |
|---|---|---|
| HD Audio Driver Reliability |
Settings > Windows Update > Check for updates Device Manager > Sound, video and game controllers > HD Audio Device |
The improved reliability is included in this build automatically after updating. To ensure you have the latest driver, check for updates in Settings > Windows Update. To manually verify or reinstall the driver, open Device Manager, expand Sound, video and game controllers, right-click the HD Audio Device, and select Update driver or Uninstall device (then restart to reinstall). |
Official announcement on the Microsoft website.
The last 10 Windows updates:
| Update | Build | Version | Windows | Channel | Date |
|---|---|---|---|---|---|
| KB5121132 | 28120.2760 | 26H1 | Windows 11 | Experimental | 2026-08-21 |
| KB5124040 | 26220.9223 | 25H2 | Windows 11 | Beta | 2026-08-21 |
| KB5124042 | 26340.9233 | 26H2 | Windows 11 | Experimental | 2026-08-21 |
| KB5121106 | 28020.2731 | 26H1 | Windows 11 | Beta | 2026-08-17 |
| KB5121109 | 28120.2738 | 26H1 | Windows 11 | Experimental | 2026-08-17 |
| KB5124036 | 26220.9202 | 25H2 | Windows 11 | Beta | 2026-08-17 |
| KB5124038 | 26340.9212 | 26H2 | Windows 11 | Experimental | 2026-08-17 |
| KB5120996 | 28000.2796 | 26H1 | Windows 11 | Preview | 2026-08-14 |
| KB5120998 | 26200.9267 | 25H2 | Windows 11 | Preview | 2026-08-14 |
| KB5120240 | 22631.7517 | 23H2 | Windows 11 | Stable | 2026-08-11 |